MS-ISAC ADVISORY NUMBER:

2018-055

DATE(S) ISSUED:

05/11/2018

OVERVIEW:

Multiple vulnerabilities have been discovered in Google Chrome, the most severe of which could result in arbitrary code execution. Google Chrome is a web browser used to access the Internet. These vulnerabilities can be exploited if a user visits, or is redirected to, a specially crafted web page. Successful exploitation of the most severe of these vulnerabilities could allow an attacker to execute arbitrary code in the context of the browser, obtain sensitive information, bypass security restrictions and perform unauthorized actions, or cause denial-of-service conditions.

THREAT INTELLIGENCE:

There are currently no reports of these vulnerabilities being exploited in the wild.

SYSTEMS AFFECTED:

Google Chrome prior to 66.0.3359.170

RISK:

Government:

Large and medium government entities: HIGH

Small government entities: MEDIUM

Businesses:

Large and medium business entities: HIGH

Small business entities: MEDIUM

Home Users:

LOW

TECHNICAL SUMMARY:

Multiple vulnerabilities have been discovered in Google Chrome, the most severe of which could result in arbitrary code execution. These vulnerabilities can be exploited if a user visits, or is redirected to, a specially crafted web page. Details of these vulnerabilities are as follows:

Heap buffer overflow in PDFium. (CVE-2018-6120)

Privilege escalation in extensions. (CVE-2018-6121)

Type confusion in V8. (CVE-2018-6122)

Chain leading to sandbox escape

Successful exploitation of the most severe of these vulnerabilities could allow an attacker to execute arbitrary code in the context of the browser, obtain sensitive information, bypass security restrictions and perform unauthorized actions, or cause denial-of-service conditions.

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